What a sad statement this is, really. I've never been at a big name farm, or shown at high levels. I am thinking maybe there is a divide there, where us lower level schlubs enjoy the process (i.e. learning how to ride and training) more than the show. Maybe that is part of the cultural change also, trying to somehow interest people in horsemanship rather than just becoming a show client. Even in my lowly circles, I have witnessed the scenario where a parent has pushed for their kid to ride at a higher level than the kid is prepared for, and leave the trainer who says little Susie isn't ready for that yet, she needs to spend more time doing X and prove she is ready for that level.
They don't love the process of shopping for horses whose combination of price tag, looks and value as a tolerant packer make the horse a rare commodity. They don't like the process of convincing the buyer to get the older, perhaps not so pretty, won't sell for as much horse that they know the client can actually ride. That's because they don't like being in the position of telling the eager and paying client that her lack of talent or saddle time is a large impediment.